XUV frequency comb production with an astigmatism-compensated enhancement cavity

J Nauta, JH Oelmann, A Borodin, A Ackermann… - Optics express, 2021‏ - opg.optica.org
We have developed an extreme ultraviolet (XUV) frequency comb for performing ultra-high
precision spectroscopy on the many XUV transitions found in highly charged ions (HCI) …

[HTML][HTML] Sympathetically cooled highly charged ions in a radio-frequency trap with superconducting magnetic shielding

EA Dijck, C Warnecke, M Wehrheim… - Review of Scientific …, 2023‏ - pubs.aip.org
We sympathetically cool highly charged ions (HCI) in Coulomb crystals of Doppler-cooled
Be+ ions confined in a cryogenic linear Paul trap that is integrated into a fully enclosing …

[HTML][HTML] Closed-cycle noble gas recycling system for high-repetition rate high-harmonic generation

JH Oelmann, L Guth, T Heldt, N Griesbach… - Review of Scientific …, 2024‏ - pubs.aip.org
We present a compact closed-loop recycling system for noble and inert gases. It has been
developed for an extreme-ultraviolet (XUV) frequency comb based on high-harmonic …

Material-inherent noise sources in quantum information architecture

HB Yang, NY Kim - Materials, 2023‏ - mdpi.com
NISQ is a representative keyword at present as an acronym for “noisy intermediate-scale
quantum”, which identifies the current era of quantum information processing (QIP) …

[HTML][HTML] Design and characterization of a cryogenic linear Paul ion trap for ion–neutral reaction studies

C Miossec, M Hejduk, R Pandey… - Review of Scientific …, 2022‏ - pubs.aip.org
Ultra-high vacuum conditions are ideal for the study of trapped ions. They offer an almost
perturbation-free environment, where ions confined in traps can be studied for extended …

[HTML][HTML] Fast silicon carbide MOSFET based high-voltage push–pull switch for charge state separation of highly charged ions with a Bradbury–Nielsen gate

C Schweiger, M Door, P Filianin, J Herkenhoff… - Review of Scientific …, 2022‏ - pubs.aip.org
In this paper, we report on the development of a fast high-voltage switch, which is based on
two enhancement mode N-channel silicon carbide metal–oxide–semiconductor field-effect …

Domain formation and structural stabilities in mixed-species Coulomb crystals induced by sympathetically cooled highly charged ions

LA Rüffert, EA Dijck, L Timm, JRC López-Urrutia… - Physical Review A, 2024‏ - APS
There is a growing interest in high-precision spectroscopy and frequency metrology for
fundamental studies using sympathetically cooled highly charged ions (HCIs) embedded in …

Ground State Cooling of a Single Beryllium Ion in a Superconducting Paul Trap

S Kokh - 2024‏ - pure.mpg.de
This thesis presents the optimization of state preparation and state detection as well as the
implementation of ground state cooling of a single beryllium ion in a superconducting …

Quantum logic spectroscopy of highly charged ions

P Micke - 2020‏ - pure.mpg.de
Fundamental interactions and symmetries define the structure and properties of all matter, in
particular of its small and diverse visible constituents—the atoms. The study of their …

Automated loading of small Coulomb crystals containing sympathetically cooled highly charged ions

LF Storz - 2024‏ - pure.mpg.de
Highly charged ions are interesting candidates for broadening our knowledge beyond the
Standard Model of Physics. In this work, an efficient automation of the loading process of a …